i have a flat tire on my ford focus, we have an subaru outback we are not using, if the tires are the same?

focus has 4 bolt pattern, subaru has 5. You would have to dismount 2 tires from focus, dismount 2 from subaru, remount 2, and then reinstall a pair -- very bad idea to have a mismatched set on front or on rear. Probably cheaper (and less headache long run) to just fix the flat or buy a tire.

Thats possible, one thing u can do is by using a measuring tape. Measure from one lug nut to another and see if distance is same on other car. Hope this helps

Look at the size. The number will be in the format of 155/50/18. The first number is the width of the tyre. Second number is the width of the wall of the tyre. Last number is the size of the rim. The numbers which need to match exactly are the rim sizes. Width is a question of whether the tyre will clear the wheel arch.

If the tire is the same size, and has a speed rating and load index that is equal or higher, then yes. I assume you would be mounting the Outback tire on the Focus rim? If so, fine. Otherwise, if you are considering using the Subaru wheel as well you could have a bolt pattern difference which will not allow you to mount it on your Ford.